If you would like to know what number is 10 less than 67, you can calculate this using the following step:
subtract 10 from 67:
67 - 10 = 57
Result: 57 is 10 less than 67.
Answer: 87%
Solution:
87 correct questions over 100 = 87/100 = .87 = (change to percent by moving the decimal 2 places to the right) 87%
I say A. because all the sides are the same.